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Integumentary System a collection of organs that helps the body maintain a stable, healthy internal environment skin protects your body from foreign particles, keeps moisture inside of you, helps to regulate body temperature, helps get rid of wastes sweat glands small organs in the skin that produce sweat to cool your body melanin a chemical in skin that determines skin color epidermis the outer, thinner layer of skin dermis the deeper, thicker layer of skin blood vessels transport substances and help regulate body temperature nerves help carry messages to and from the brain muscle fibers attached to a hair follicle can contract and cause the hair follicle to stand up hair follicles in the dermis, produce hair oil glands release oil that keeps the epidermis waterproof and helps keep hair flexible sweat contains waste materials, helps to cool the body nails (fingernails, toenails) protect tips of fingers and toes